arch/powerpc/platforms/85xx/p1022_ds.c

   1 /*
   2  * P1022DS board specific routines
   3  *
   4  * Authors: Travis Wheatley <travis.wheatley@freescale.com>
   5  *          Dave Liu <daveliu@freescale.com>
   6  *          Timur Tabi <timur@freescale.com>
   7  *
   8  * Copyright 2010 Freescale Semiconductor, Inc.
   9  *
  10  * This file is taken from the Freescale P1022DS BSP, with modifications:
  11  * 1) No DIU support (pending rewrite of DIU code)
  12  * 2) No AMP support
  13  * 3) No PCI endpoint support
  14  *
  15  * This file is licensed under the terms of the GNU General Public License
  16  * version 2.  This program is licensed "as is" without any warranty of any
  17  * kind, whether express or implied.
  18  */
  19
  20 #include <linux/pci.h>
  21 #include <linux/of_platform.h>
  22 #include <linux/memblock.h>
  23
  24 #include <asm/mpic.h>
  25 #include <asm/swiotlb.h>
  26
  27 #include <sysdev/fsl_soc.h>
  28 #include <sysdev/fsl_pci.h>
  29
  30 void __init p1022_ds_pic_init(void)
  31 {
  32         struct mpic *mpic;
  33         struct resource r;
  34         struct device_node *np;
  35
  36         np = of_find_node_by_type(NULL, "open-pic");
  37         if (!np) {
  38                 pr_err("Could not find open-pic node\n");
  39                 return;
  40         }
  41
  42         if (of_address_to_resource(np, 0, &r)) {
  43                 pr_err("Failed to map mpic register space\n");
  44                 of_node_put(np);
  45                 return;
  46         }
  47
  48         mpic = mpic_alloc(np, r.start,
  49                 MPIC_PRIMARY | MPIC_WANTS_RESET |
  50                 MPIC_BIG_ENDIAN | MPIC_BROKEN_FRR_NIRQS |
  51                 MPIC_SINGLE_DEST_CPU,
  52                 0, 256, " OpenPIC  ");
  53
  54         BUG_ON(mpic == NULL);
  55         of_node_put(np);
  56
  57         mpic_init(mpic);
  58 }
  59
  60 #ifdef CONFIG_SMP
  61 void __init mpc85xx_smp_init(void);
  62 #endif
  63
  64 /*
  65  * Setup the architecture
  66  */
  67 static void __init p1022_ds_setup_arch(void)
  68 {
  69 #ifdef CONFIG_PCI
  70         struct device_node *np;
  71 #endif
  72         dma_addr_t max = 0xffffffff;
  73
  74         if (ppc_md.progress)
  75                 ppc_md.progress("p1022_ds_setup_arch()", 0);
  76
  77 #ifdef CONFIG_PCI
  78         for_each_compatible_node(np, "pci", "fsl,p1022-pcie") {
  79                 struct resource rsrc;
  80                 struct pci_controller *hose;
  81
  82                 of_address_to_resource(np, 0, &rsrc);
  83
  84                 if ((rsrc.start & 0xfffff) == 0x8000)
  85                         fsl_add_bridge(np, 1);
  86                 else
  87                         fsl_add_bridge(np, 0);
  88
  89                 hose = pci_find_hose_for_OF_device(np);
  90                 max = min(max, hose->dma_window_base_cur +
  91                           hose->dma_window_size);
  92         }
  93 #endif
  94
  95 #ifdef CONFIG_SMP
  96         mpc85xx_smp_init();
  97 #endif
  98
  99 #ifdef CONFIG_SWIOTLB
 100         if (memblock_end_of_DRAM() > max) {
 101                 ppc_swiotlb_enable = 1;
 102                 set_pci_dma_ops(&swiotlb_dma_ops);
 103                 ppc_md.pci_dma_dev_setup = pci_dma_dev_setup_swiotlb;
 104         }
 105 #endif
 106
 107         pr_info("Freescale P1022 DS reference board\n");
 108 }
 109
 110 static struct of_device_id __initdata p1022_ds_ids[] = {
 111         { .type = "soc", },
 112         { .compatible = "soc", },
 113         { .compatible = "simple-bus", },
 114         { .compatible = "gianfar", },
 115         /* So that the DMA channel nodes can be probed individually: */
 116         { .compatible = "fsl,eloplus-dma", },
 117         {},
 118 };
 119
 120 static int __init p1022_ds_publish_devices(void)
 121 {
 122         return of_platform_bus_probe(NULL, p1022_ds_ids, NULL);
 123 }
 124 machine_device_initcall(p1022_ds, p1022_ds_publish_devices);
 125
 126 machine_arch_initcall(p1022_ds, swiotlb_setup_bus_notifier);
 127
 128 /*
 129  * Called very early, device-tree isn't unflattened
 130  */
 131 static int __init p1022_ds_probe(void)
 132 {
 133         unsigned long root = of_get_flat_dt_root();
 134
 135         return of_flat_dt_is_compatible(root, "fsl,p1022ds");
 136 }
 137
 138 define_machine(p1022_ds) {
 139         .name                   = "P1022 DS",
 140         .probe                  = p1022_ds_probe,
 141         .setup_arch             = p1022_ds_setup_arch,
 142         .init_IRQ               = p1022_ds_pic_init,
 143 #ifdef CONFIG_PCI
 144         .pcibios_fixup_bus      = fsl_pcibios_fixup_bus,
 145 #endif
 146         .get_irq                = mpic_get_irq,
 147         .restart                = fsl_rstcr_restart,
 148         .calibrate_decr         = generic_calibrate_decr,
 149         .progress               = udbg_progress,
 150 };